Merge pull request #123 from flashbots/ci-docker-push

CI: on release, push docker image

Author: metachris

.github/workflows/release.yaml

@@ -149,3 +149,65 @@ jobs:
           echo "---"
           echo "### Release Draft: ${{ env.VERSION }}" >> $GITHUB_STEP_SUMMARY
           echo "${{ steps.create-release-draft.outputs.url }}" >> $GITHUB_STEP_SUMMARY
+
+  build-docker:
+    name: Build and push Docker image
+    needs: extract-version
+    if: ${{ github.event.inputs.build-docker == 'true' || github.event_name == 'push' }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    env:
+      VERSION: ${{ needs.extract-version.outputs.VERSION }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=semver,pattern={{version}},value=${{ env.VERSION }}
+            type=semver,pattern={{major}}.{{minor}},value=${{ env.VERSION }}
+            type=semver,pattern={{major}},value=${{ env.VERSION }}
+            type=sha,prefix=sha-
+            type=raw,value=latest,enable=${{ !contains(env.VERSION, '-') }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Write GitHub Step Summary
+        run: |
+          echo "### Docker Image Published" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Image:** \`ghcr.io/${{ github.repository }}\`" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Tags:**" >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+          echo "${{ steps.meta.outputs.tags }}" >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY